Muffler



H. ANDRESEN MUFFLE R Filed Nov. 24, L920 Z Sheets-Sheet 1 INVENTOR BY M2 ATTORNEYS Nov. 11, 1924- 1;515,323

' -H. ANDRESEN MUFFLER Filed Nov. 2 1920 '2 Sheets-$heel 2 VII III

. INVENTOR M BY ATTORNEYS Patented Nov.-11, 1924.

' UNITED STATES PATENT OFFICE.

\ EALVOR ANDBIESEN, OF NEW YORK, N. Y., ASSIGNOR TO THE VACUUM MUFFLER GORPO 'RATION,'OF NEW YORK, N. Y.., ACORPORATION OF NEW YORK.

MUFFLER.

Application filled November 24, 1920. Serial No. 426,198.

To all whom it may concern:

Be it known that I, HALVOR ANDRESEN,

\ a subject of the King of Norway, and a resident of the borough of Manhattan, in the city of New York, county and State of New York, have invented new and useful Improvements in Mufilers, of which the following is a; specification.

My invention relates to silencers or mufflers for engines ejecting gases at a higher pres:

sure than the atmospheric pressure and Where a silent escape of such exhaust gases to the atmosphere is desirable.

One of the objects of this invention is to destroy the sound energy of the explosive wave which is set up by the sudden release of gases under pressure into the exhaust conduits of an engine. Inasmuch as the medium transmitting the wave is the gases passing through the muflier, I attain the object soughtby splitting up the passage for the gases into sets of long, narrow slots in such a way that in each set the slots are substantially opposed to each other, so that the stream of matter or energy passing through the slots will be caused to collide with each other somewhere between the opposed slots. This division into sets of 0pposed streams through opposed openings and subsequent reunion may be repeated until the desired degree of silence is obtained.

The narrow slots or openings through which the gases escape may be" opposed directly against each other in the direction of the flow from the openings or slots or at an acute angle, as desired and the opposed, narrow openin s or slots may be increased in number until the desired degree of silence is obtained.

There are numerous ways in which a mufiler embodying my invention may be desi ed and in the accompanying drawings Iiiive shown several embodiments of my invention.

Fig. 1 showsin sectional elevation a m-ufiler embodying my invention, the section being taken substantially on the line 1-1 of Fig. 3;

Fig. 2 is a fragmentary section on the line 22 of Fig. 1; I

Fig. 3 is a'plan view of the lower part of the mufller of Fig. 1;

- Fig.4 is a fragmentary section of a modiing through the narrow slot 9 between the fied form of ribs which may be employed in the mufiier of Fig. 1 if desired;

Figs. 5, 6 and 7 show a still further modification of my invention, Fig. 5 being a sec tional elevation of the same, Fig. 6 being a section taken substantially on the line 99 of Fig. 5 and Fig. 7 being a section taken substantially on the line 10-10 of Fig. 5;

Fig. 8 is a modification of the construction shown in Fig. 6;

Figs. 9 and .10 show a further modification of my improved muffler, Fig. 9 being a section taken substantially on the line 12-12 of Fig. 10 while Fig. 10 's a view taken substantially on the line 31 3 of Fig. 9; and

Fig. 11 shows in sectional elevation a modification of the lower part of the mufller of Fig. 5.

Referring to the drawings in detail and first of all to the embodiment of my invention as illustrated in Figs. 1, 2 and 3, 1 and 2 designate respectively the upper and lower castings constituting a part of my improved mufller and which castings may be clamped together in any suitable manner as by bolts 3. The casting 1 is provided with an inlet 4 through which the exhaust gases enter the muffler and disposed about this inlet and extending radially therefrom are a series of ribs 5. The lower casting 2 of the muflier is provided with a series of spaced radiallydisposed ribs 6. The ribs 5 are in effect superimposed upon the ribs 6 but are offset 1 relatively thereto and spaced therefrom so that the gases entering the Inufller at 4: will traverse the spaces 8 between the ribs 5 and the stream of gas from one .of these spaces will impinge against a stream of gas coming from the adjacent space, the gases passtwo sets of ribs.

It will be seen that the spaces between the ribs 6 increase in cross-sectional area in the direction of flow through the muflier and it will also be seen that the spaces between the ribs 5 by reason of the disposition of the ribs, is tapered. The gases in leaving the spaces between the ribs 6 pass between the ends of said ribs and a series of ribs 10 with which the casting 1 is provided, a narrow opening 11 being left between these ribs and the casting 2 to permit ofthe escape of carbon or dust which might otherwise tend to accumulate at this point.

In addition to the impinging of the streams of exhaust gases against each other in passing through the muflier as already noted, it will be seen that the stream of gases in passing between the ribs 6 and 10 will also partly impinge .upon each other, thereby increasing the silencing effect of the mufiler. The gases escaping from "between the ribs 10 pass into a conduction chamber 12 leading to the delivery opening 13 of the mufller. This conduction chamber, it will be observed from Fig. 3 for example, increases in cross-sectional area in substantially the same proportion as if the spaces between the ribs 5 and 6 were added along the circumference of the ribs 10. v

The disposition of the ribs 5 and 10 relative to the ribs 6 not being clearly apparent from Fig. 1, these ribs have been indicated in dotted lines .in Fig. 3.

Should it be desired to cool the gases, in the form of muflier shown in Fig. l for example, water may be conducted into the mufiler at the orifices 14. By introducing the water in this manner the same comes into close contact with the hot gases in the mufiler so that a better cooling effect upon the escaping gases is obtained than though the water were injected into a solid stream of exhaust g It will be seen from the foregoing that I have provided a mufiler through which the exhaust gases must flow through sets of long, narrow, opposed openings arranged around an initial receiving space in such a manner that the distance from the receiving space to the opposed part of each set of narrow openings is substantially the same.

7 In Fig. 4 I have shown a modified form of rib in which ribs 15 and 16 correspond to the ribs 5 and 6 already referred to, the opposed openings in this figure designated 17 and 18 being disposed at an acute angle relatively to each pther'instead of in the manncr illustrated in F i 2.

In Figs. 5, 6 and g I have illustrated still another form of my. invention. In this figure I provide upper and lower castings 32 and 33 respectively, the upper casting being provided with an inlet 34 and the lower casting being provided with an outlet 35 for the mufiier. Formed on the casting 32 and radially disposed with respect to the inlet opening 34 is a series of ribs 36 similar to the ribs 5 of Fig. 1. In addition I provide between the castings 32 and 33 a slotted plate 37 clamped in' position, a cross-section of the plate 36 being shown in Fig. 6. The casting 33 is provided with a series of radially disposed ribs 38 or if desired these ribs may constitute a slotted plate similar to the plate 37. The relative arran ement of the ribs 36, the plate 37 and the ri s 33 is illustrated in after they leave the openings 39, 40, 41

and 42.

Fig. 8 illustrates a modification of the ribs 36 of Fig. .6 and the portions 37 and 41 of the same figure, the members 43, 44 and 45 of Fig. 8 corresponding to the members 36, 37 and 41 of Fig. 6. Here it will be seen that the exhaust .gases passing through the mufller are obliged-to traverse the openings 46 and 47 between adjacent ribs 43 and will then pass through opposed openings 48 and 49 where the streams of gases will impinge against each other,'the gases then traversing the openings 50 between adjacent ribs 44 and thereafter traversing opposed openings 51 and 52.

Figs. 9 and 10 show still a further embodiment of my invention wherein the narrow, opposed, slot principle is employed. I here provide castings 53 and 54 between which are clamped sl'otted plates 55 and 56, these plates being spaced slightly from each other and the slots in the plates being ofi'set relatively to each other so that the exhaust gases passing through the muflier are caused to traverse opposed slots 57 and 58 to cause the streams of gases to impinge against each other to produce a silencing effect. I have here provided a conduction chamber into which the gases after passing through the slotted members 55 and 56 are discharged. This conduction chamber is provided with a series of metal members 59, 60 and 61, these members being disposed relatively to each other so as to gradually increase the cross sectional area of the conduction chamber. The members 59,60 and; 61 tend to produce a whirling motion upon the gases passing through the muflEler to create a suction efi'e'ct upon the slower following gases. The gases finally escape from the muflier at the out- In Fig. 11 I have shown a portion of a mufiler which ma be substituted for the lower portion 33 o the mufiler of Fig. 5, this figure showing a casting 63 which may be substituted for the'casting 33 of Fig. 5 and which is provided with an outlet 64 at the center of the mufller insteadof near the peri hery as in the casting 33 of Fig. 5.

at I claim is:

1. A mufiier comprising a member, a set of spaced ribs carried thereby, a second member, and a set of spaced ribs carried by the second member, the first member and its ribs being superimposed upon the second member and its ribs and spaced therefrom with the ribs carried by one member offset relatively to the ribs carried by the other member.

2. A mufller comprising two members se- 7 cured to each other, one member being procured to each other, one of said members being provided with a receiving opening and the other with a discharge opening, a set of spaced members carried by each of said body members, these sets of spaced members being spaced from each other, the crosssectional area of the spaces between the sets of spaced members increasing in the direction of flow of gases through the mufller,

said spaced members being so arranged that gases flowing through the mufller are broken up into streams which impinge against each other.

4. In a muflier, a body member provided with a receiving opening, a second body member secured to the first-named member and provided with a discharge opening, spaced ribs carried by the first-named member and extending radially with respect to the receiving opening, spaced ribs carried by the second-named ody member, the second set of ribs being spaced from the first set of ribs to form narrow, opposed openings, a receiving chamber communicating the direction of flow of the with said discharge opening, said receivin chamber being arranged relatively to sai ribs so that gases passing through the mufiier from the receiving opening to the discharge opening are constrained to flow through narrow openings in a direction to cause the gas streams to impinge against each other to be finally received by said receiving chamber and to pass thence to the discharge opening.

5. A mufiler comprising a pair of body members secured to each other, a pair of slotted members interposed between said body members, the slots of said slotted members being so disposed as to form opposed openings which break the gases up into streams which are impinged against each other, and a conduction chamber for conducting gases to the exterior of the mufiler after the same pass through said slotted members, said conduction chamber being provided with means for gradually increasing the cross-sectional area of the same in ases toward the discharge outlet of the mu er.

, 6. A mufller comprising a set of spaced ribs lying in the same horizontal plane and a second set of spaced ribs lying in the one plane and superimposed upon the first set and spaced therefrom, the ribs of one set being ofise t relatively to the ribs of the other a set, so that the face of the ribs of one set overlie the spaces between the ribs of the other set, the space between adjacent superimposed faces of the ribs of the two sets providing openin for receiving the gases passing through t e muflier to cause the as streams to impinge against each other or the purpose set forth.

This specification signed this 17th day of November, 1920.

' HALVOR ANDRESENV 

